Female mice receiving oral administration of the insecticide lindane either before or immediately after mating increased blastomere lysis and suppressed cell proliferation of two-cell embryos and morulae (Scascitelli and Pacchierotti 2003).

The researchers obtained forty-eight blastomeres from the seventeen polyspermic embryos (eight two-cell, two three-cell, five four-cell, and two eight-cell), or theoretically forty-eight new totipotent embryos.

CHICAGO -- Blastomere biopsy of IVF embryos to perform preimplantation genetic analysis may decrease spontaneous abortions due to abnormal karyotype, according to a study presented at the annual meeting of the Society for Gynecologic Investigation.

This procedure, known as "Accurate 23 chromosome aneuploidy screening in human blastomeres using single nucleotide polymorphisms (SNP)," provides fertility specialists for the first time with a rapid and accurate technique to assess the genetic normality of human embryos created through in vitro fertilization (IVF).

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